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Marine Thunderstorm Wind · Atlantic North

Marine Thunderstorm Wind September 6, 2025 · Long Island Sound W of New Haven Ct To Port Jefferson Ny, Atlantic North

64 mph

Measured gust (56 kt)

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Mesonet site XLAR at Larchmont Harbor measured a 56 knot wind gust.

The wider storm

An upper level trough approached from the west along with an associated surface cold front. The environment over the area ahead of the front was able to destabilize with MLCAPE values reaching about 2000 J/kg. This, combined with ample Effective Bulk Shear of about 45 kt, allowed severe thunderstorms to develop as the cold front moved through the area. These storms produced damaging wind gusts.

Began near Larchmont Harbor Wxflow (40.9200, -73.7300).

Source: NOAA Storm Events Database, event 1294902. Narratives are written by the National Weather Service forecast office that issued the report.

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